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A cardinal mark is a sea mark (a buoy or other floating or fixed structure) commonly used in maritime pilotage to indicate the position of a hazard and the direction of safe water. Cardinal marks indicate the direction of safety as a cardinal ( compass ) direction ( north , east , south or west ) relative to the mark.
They are also known as fairway buoys and clear water buoys. They are recognisable by their red-and-white vertical stripes and commonly bear a top sign in shape of a red ball. They either flash Morse code "A" (di-dah), or one long flash, occulting (more light than dark) or isophase (equal light and dark) every 10 seconds (L Fl 10s).
A Morse code light is light in which appearances of light of two clearly different durations (dots and dashes) are grouped to represent a character or characters in the Morse Code. For example, "Mo(A)" is a light in which in each period light is shown for a short period (dot) followed by a long period (dash), the Morse Code for "A".
Emergency wreck buoys provide a clear and unambiguous means of temporarily marking new wrecks, typically for the first 24–72 hours. They are coloured in an equal number of blue and yellow vertical stripes and fitted with an alternating blue and yellow flashing light.
The buoy is expected to be deployed for the first 24-72 hours after the wreck occurs. After that time more permanent buoyage (such as isolated danger marks or cardinal marks) should be deployed and charts updated. [1] The buoy is designed to "provide a clear and unambiguous" [1] mark of a new and uncharted danger. The buoy is painted with 4, 6 ...
A meeting with investigators, which included two Horry County Council members, reveals police no longer have some evidence from the shooting that happened Sept. 9 in the Longs area.
A white anchor light on the mast was visible for 1km (3,000 feet) or more. SOS signals giving the location of the buoy were automatically sent out by an emergency wireless transmitter. Signal pistols with red and white lights, white-light parachute flares, or a smoke, distress-signalling apparatus completed the signalling equipment.
Suicide is the second leading cause of death among people ages 10-24, according to the Centers for Disease Control and Prevention, and suicide rates for that age group increased more than 50% from ...